He is not necessarily wrong.

When the strong shaking occurred, we immediately evacuated.

This apple is very hard.

The government declared a state of emergency to prevent the spread of the new coronavirus.

Pronouncing the palatal sounds in Japanese is difficult.

He used a metal detector to search for treasure on the beach.

Strong interaction is one of the four fundamental forces in particle physics.

Alkaline earth metals are located in Group 2 of the periodic table.